Tested on my pearly black car, 2 caps mixed with 10L of warm water. Pleasantly surprised by the result: a beautiful shiny polish effect, finger and water slides on the body. To note one important detail: the rinsing with demineralized water or rain! I recommend this product, however, the price charged (14.99) is slightly above the normal price, that is why I put 4 stars instead of 5.